1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfbad51a0f1a9645a3230e79847d05531e3a6afd365ee91b01b7d8e39d7c3c6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85a2ed60-8e46-4a7a-a9e6-46284429af88.json and https://artists.proofprofile.net/proofs/artist/85a2ed60-8e46-4a7a-a9e6-46284429af88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b591372e5d8f57d2c6aecbec3dd093eecfcd3e10aa941c1198838723e2bdc22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3eEw21LfhO93tMZW7q1aFe.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3eEw21LfhO93tMZW7q1aFe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce384cb68231c6d18f3e874b4c3e167b29c4895b80e401c60b84969100591ce1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7gGGU7T2Is9vF3zs1mtQWH.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7gGGU7T2Is9vF3zs1mtQWH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f6ee34ea01863665aca7c6783875316e76179d8d67b2b507c609920d6c59ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0kpFh0DFpEHy912suN3gMJ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0kpFh0DFpEHy912suN3gMJ.
{"copyright_id":"0x92e5a0df02d19e8c396d71cc2acd7490f714ba9bbdce7d3d7aaca0046e469a7c","isrc":"QZNWW2114785","name":"Aint fold yet","registered_at":"2026-06-18T21:24:34Z","spotify_id":"2NecyRIbW6YmXqIjCcIvBt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e5a0df02d19e8c396d71cc2acd7490f714ba9bbdce7d3d7aaca0046e469a7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2NecyRIbW6YmXqIjCcIvBt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2NecyRIbW6YmXqIjCcIvBt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd5407d835b311ba656ebbfe1da09a4f35be457c8c2d13a306143f303e09966. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0vD7b7iPLbFjot6g0oTQDv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0vD7b7iPLbFjot6g0oTQDv.
{"copyright_id":"0xf68538c303ed3f7a1ee07a41b7cd237e2a26e8bb8b126b6cbc4e4fcaf85ed372","isrc":"QZNWW2114787","name":"Day at a time","registered_at":"2026-06-21T09:51:46Z","spotify_id":"6UUOaBXbnuFs4YhrRhktmp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68538c303ed3f7a1ee07a41b7cd237e2a26e8bb8b126b6cbc4e4fcaf85ed372. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6UUOaBXbnuFs4YhrRhktmp.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6UUOaBXbnuFs4YhrRhktmp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59a5c4c6e8180fa12e42df5586da627a4e9b9d0f440b752927f9d1a71e6205. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6uqXn2NWtKuhM4xAFBUUgv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6uqXn2NWtKuhM4xAFBUUgv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4689cf366339370c97d6b19312d7be48c11ff986c6ddae3e508344629236441a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Ht5AvCoELvHwB9qAqN19F.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2Ht5AvCoELvHwB9qAqN19F.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced8fa1c77db080aaf1b3e15831291a70ab37a73ea6ee9656eb085f2f5a887a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1lfvCI5lg853AcHoxlim0i.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1lfvCI5lg853AcHoxlim0i.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e496917a0cb77af018543387903faf871e527423b3ef9c1d1660cf9512c57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2OykttpXGwMGU0fcXsU2er.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2OykttpXGwMGU0fcXsU2er.